| acrobatic | acrobatique |
| acrobatics | acrobatie |
| Acrobatidae | Acrobatidae |
| Acrocanthosaurus | Acrocanthosaure |
| Acrocephalus | Acrocephalus |
| Acroceridae | Acroceridae |
| Acrochordidae | Acrochordus |
| Acrocorinth | Acrocorinthe |
| acrocyanosis | acrocyanose |
| acromegaly | acromégalie |
| Acron | Akron |
| acronym | acronyme |
| Acronym and initialism | Acronymie |
| acrophobia | peur des lieux élevés |
| acrophony | acrophonie |
| acropolis | acropole |
| Acropomatidae | Acropomatidae |
| Acropora | Acropora |
| across | outre |
| Across the Universe | Across the Universe |
| acrostic | acrostiche |
| Acroterion | Acrotère |
| Acryl group | Polyméthacrylate de méthyle |
| acrylamide | acrylamide |
| acrylic | fibre acrylique |
| Acrylonitrile butadiene styrene | Acrylonitrile butadiène styrène |
| act | action |
| act as | jouer |
| Act as a middleman | Faire le courtage |
| Act as an agent | Servir de médiateur |
| Act as interpreter | Interprétation français |
| act before | agir auparavant |
| act big | agir en se vantant |
| act boastfully | agir en se vantant |
| act for | représenter |
| act haughty towards | mépriser |
| act in opposition to | s'opposer à |
| Act like a child | Être puéril |
| ACT New Zealand | ACT New Zealand |
| Act of Congress | Loi du Congrès |
| Act of deriving | Dérivée partielle |
| act of God | cas fortuit |
| Act of Mediation | Acte de médiation |
| Act of oblivion | Amnistie |
| Act of Parliament | Droit |
| Act of protest | Protêt |
| Act of sabotage | Acte de sabotage |
| Act of state | Cérémonie officielle |
| Act of terrorism | Acte de terrorisme |
| Act of war | Acte de guerre |
| act on one's own discretion | à votre discrétion |
| act one's age | ne pas faire l'enfant |
| act uppity towards | mépriser |
| Acta Apostolicae Sedis | Acta Apostolicae Sedis |
| Acta Diurna | Acta Diurna |
| Acta Eruditorum | Acta Eruditorum |
| Acta Sanctorum | Acta Sanctorum |
| Actaea | Actaea |
